Patents by Inventor Helmut Dressler

Helmut Dressler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Motor vehicle headlight
    Patent number: 4796163
    Abstract: A headlight for motor vehicles is provided with a unit for preventing fog formation on the internal walls of the headlight or its reflector. The unit can be interchangeable and includes an inlet valve for admitting air into the interior of the reflector when underpressure prevails in said interior and an overpressure-responsive outlet valve which permits air to flow out from said interior into the atmosphere when overpressure occurs in the interior of the reflector. The unit is filled with drying agent for adsorbing moisture from the passing air.
    Type: Grant
    Filed: November 17, 1986
    Date of Patent: January 3, 1989
    Assignee: Robert Bosch GmbH
    Inventor: Helmut Dressler
  • Headlight for motor vehicles
    Patent number: 4635173
    Abstract: In a headlight of a motor vehicle, having a housing and a diffusing lens enclosing with the housing an interior of the headlight, the interior is vented by means of a conduit exposed to air streams caused by travelling of the motor vehicle. The conduit is formed as an integrated part of the diffusing lens made of plastics.
    Type: Grant
    Filed: February 13, 1986
    Date of Patent: January 6, 1987
    Assignee: Robert Bosch GmbH
    Inventors: Helmut Dressler, Peter Engenhart, Klaus Jahnel, Heinrich Kochendorfer, Ulrich Kuhn, Karl H. Matthas, Kurt Schuster